**2.1.1 Each component fibre and mineral content of biogas residue**

The determination of each component fibre and mineral content was shown in table 2-2.


Table 2-2. The fibre and minerals content and their mass percentages of each group

Table 2-2 showed that fibre quality percentage of 0.25 mm to 0.5 mm was maximum; fibre quality percentage of more than 0.5 mm was min; minerals quality percentage of 0.5 to 1 mm was maximum, minerals quality percentage of more than 5 mm was min.
